Pulley jack



D. c.- MCBRIDE runway JACK Filed April 10. 1925 2 shun-sum 1 Oct. 27.1925- 5 539] o. c. mama:

PULLEY JACK Filed April 10. 1925 2 Shasta-Sheet 2 JIM,

Patented Get. 27, 1925.

UNITED STATES DONALD C. MCBRIDE, F LULING, TEXAS.

PULLEY max.

Application filed April 10, 1925. Serial No. 22,165.

To aZZ whom it may concern:

Be it known that I, DONALD C. MCBRIDE, a citizen of the United States,residing at Luling, in the county of Caldwell and State of Texas, haveinvented a new and useful Pulley Jack, of which the following is aspecification.

This invention relates to pulley acks, and aims to provide a device ofthis character which will insure a steady, straight and even pull on thepump mechanism used in wells.

Another object of the invention is to provide a device of this characterwhich will permit of easy and convenient accessibility to the well, forthe purpose of maintaining the polish rods, stuffing box, valves, suckerrods and other elements of the well construction in repair.

With the foregoing and other objects'in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, may be made within thescope of what is claimed, with out departing from the spirit of theinvention.

Referring to the drawings:

Figure 1 is a side elevational view of a jack constructed in accordancewith the invention.

Figure 2 is an elevational View illustrating the jack as moved to itsactive position.

Figure 3 is a plan view'thereof.

Figure 4 is a transverse sectional view through the jack.

Figure 5 is a section on line 5r-5 of Figure 1. i

Referring to the drawings in detail, the device includes a supportembodying the legs 5 that have their lower ends positioned in thetubular members 6 carried by the base members 7.

The members6 embody separable sections held together by means of bolts 8that pass through suitable openings formed in the lateral ears 9,constituting a part thereof.

Thus it will be seen that due to this construction, the leg members 5may be adjusted longitudinally of the tubular members 6 to vary theheight of the body portion to be hereinafter more fully described. Theupper ends of the leg members 6 extend into the tubular members 10 whichare also seetional, the sections being connected by means of bolts 11permitting of an adjustment being made between the leg members andmembers 10.

Mounted on the upper ends of the members 10 are supporting blocks 12that provide rests for .the bearing members 13, the bearing members 13being secured by means of the bolt 14: that pass therethrough- Thereference character 15 indicates the bearings for the main shaft 16, onwhich the body portion or pulley 17 is mounted, collars 18 beingprovided at the outer ends of the shaft 16 to prevent movement of theshaft 16 through its bearings.

The pulley embodies a main section 19 eccentrically mounted on the shaft16 and as shown, the pulley is formed with an enlarged portion 20 cutaway at its sides to provide shoulders 21 which shoulders providesupports for the lateral flanged members 22 that are secured to theenlarged portion 20 by means of bolts 23. t

The cable used in connection with the jack is indicated at 24 andextends over the curved surface 25 of the body portion, the same beingsecured within one of the grooves formed on the flanged member so thatas the curved surface of the member 17 moves from a posiiton as shown byFigure 1 to a position as shown by Figure 2, the cable will be drawnfrom the well casing which is indicated at 26.

The reference character 27 indicates the power cable which maybeextended to a pump or well, the pulley may be moved to a position asshown by Figure 3 of the drawings, whereupon the pulley is out of theway, permitting free access to the well casing and pump elements.

I claim In a pump jack, a body portion formed with a curved surface andhaving a shaft opening, shoulders formed adjacent to the shaft opening,lateral members having outer curved edges and straight end edgesextending to the shoulders, the inner ends of the lateral membersresting on the shoulders, outwardly curved flanges arranged one abovethe other and formed integral with the lateral members defining grooves,and bolts 10 extending through the lateral members and body portion forsecuring the lateral members to the body portion.

In testimony that I claim the foregoing as my own, I have hereto alfixedmy signa- 15 ture.

DONALD C. MCBRIDE.

